#!/bin/sh
##########################################################################
#                                  _   _ ____  _
#  Project                     ___| | | |  _ \| |
#                             / __| | | | |_) | |
#                            | (__| |_| |  _ <| |___
#                             \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
##########################################################################

set -eu

export LC_ALL=C
export TZ=UTC

version="${1:-}"

if [ -z "$version" ]; then
  echo "Specify a version number!"
  exit
fi

rel="trurl-$version"

mkdir "$rel"

# update title in markdown manpage
sed -ie "s/^Source: trurl \([0-9.]*\)/Source: trurl $version/" trurl.md

# update version number in header file
sed -ie "s/\"[\.0-9]*\"/\"$version\"/" version.h

# render the manpage into nroff
./scripts/cd2nroff trurl.md > "$rel"/trurl.1

# create a release directory tree
git ls-files ':!:.git*' ':!:*/.git*' ':!:REUSE.toml' ':!:LICENSES/*' -z | xargs -0 -r -I{} cp -p --parents {} "$rel"

# create tarball from the tree
targz="$rel.tar.gz"
tar cfz "$targz" "$rel"

timestamp=${SOURCE_DATE_EPOCH:-$(date +"%s")}
filestamp=$(date -d "@$timestamp" +"%Y%m%d%H%M.%S")

retar() {
  tempdir=$1
  rm -rf "$tempdir"
  mkdir "$tempdir"
  cd "$tempdir"
  gzip -dc "../$targz" | tar -xf -
  find trurl-* -depth -exec touch -c -t "$filestamp" '{}' +
  tar --create --format=ustar --owner=0 --group=0 --numeric-owner --sort=name trurl-* | gzip --best --no-name > out.tar.gz
  mv out.tar.gz ../
  cd ..
  rm -rf "$tempdir"
}

# make it reproducible
retar ".tarbuild"
mv out.tar.gz "$targz"

# remove the temporary directory
rm -rf "$rel"

# Set deterministic timestamp
touch -c -t "$filestamp" "$targz"

echo "Now sign the release:"
echo "gpg -b -a '$targz'"
